samples/risp4ml/common/image.c

#include <stdlib.h>

#include "samples/risp4ml/common/image.h"

Image* image_new(uint16_t num_channels, uint16_t height, uint16_t width) {
  Image* image = (Image*)malloc(sizeof(Image));
  if (image) {
    image->num_channels = num_channels;
    image->height = height;
    image->width = width;
    uint32_t num_pixels = width * height * num_channels;
    image->data = (pixel_type_t*)malloc(num_pixels * sizeof(pixel_type_t));
  }
  return image;
}

void image_delete(Image* image) {
  if (image) {
    if (image->data) free(image->data);
    free(image);
  }
}

pixel_type_t* image_pixel(Image* image, uint16_t c, uint16_t y, uint16_t x) {
  const uint32_t stride_c = image->width * image->height;
  const uint16_t stride_y = image->width;
  const uint16_t stride_x = 1;
  return (image->data + c * stride_c + y * stride_y + x * stride_x);
}

pixel_type_t* image_row(Image* image, uint16_t c, uint16_t y) {
  const uint32_t stride_c = image->width * image->height;
  const uint16_t stride_y = image->width;
  return (image->data + c * stride_c + y * stride_y);
}